Anyone else having this issue?
No, but your post is a bit thin on detail to effectively offer to troubleshoot your issue.
What version of XAMPP and which Windows OS?
Any error messages in the browser when the web site crashes?
Any clues to the web site crashes in the apache error log?
Any clues to the web site crashes in the Windows Event Viewer?
There are a few other settings in the php.ini file that are tied to this procedure and can be found by clicking on the links next to the items you wish to edit in the php.ini file - for example:http://php.net/post-max-sizehttp://php.net/upload-max-filesize
So if all items are configured correctly in the php.ini file to match your intended purpose, as outlined in the php manual, then your web sites may not be so prone to crashing.